The HSTT25-C Thin Wall Heat Shrink Tubing Shrinks Around Wires, Connectors, Joints, and Terminals When Heated to Protect Against Abrasion. Applications Include Insulating and Protecting Wires/Cables In Indoor, Dry Locations. Shrink Ratio: 2:1. Temperature Range: -67°F to 275°F (-55°C to 135°C). Flame Retardant, Cross-Linked Polyolefin. 0.25” Diameter X 100’ Long (6.4 MM X 30.5 M). Color Black. 1 Roll.